SciELO - Scientific Electronic Library Online

 
vol.58 issue4Provenance and tectonic setting of the protoliths of the Metamorphic Complexes of Sierra de San LuisDuctile deformation shear belts at Pampean Ranges near Córdoba, Central Argentina: A Review author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO

Share


Revista de la Asociación Geológica Argentina

Print version ISSN 0004-4822

Abstract

VUJOVICH, GI  and  OSTERA, HA. Evidence of the Pampean cycle in the basament of the north-western sector of Sierra de San Luis. Rev. Asoc. Geol. Argent. [online]. 2003, vol.58, n.4, pp.541-548. ISSN 0004-4822.

A preliminary zircon U-Pb age is presented for a feldspar-biotite gneiss from the Nogoli Metamorphic Complex, Sierra de San Luis, at San Francisco del Monte de Oro. The data show a cristallization age of 554 ± 4,8 Ma, which represents one of the first evidences of the Pampean Cycle in this geological setting. An episodic lead loss for Cretaceous times (112 ± 23 Ma) is postulated, based on the lower intercept of the discordia line. This age could be associated with anomalous thermal gradients due the extensional and rifting processes which affected Gondwana during the opening of the South Atlantic Ocean.

Keywords : U-Pb ages; Zircons; San Luis Range; Sierras Pampeanas; Pampean Cycle.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License